Yes, the replacement air spring for the 2020 Recon TK B1/RL B1 is part number 11.4018.103.003 (FORK SPRING SOLO AIR ASSEMBLY - 27.5/29 SOLO AIR (INCLUDES TOP CAP, AIR PISTON, SHAFT BOLT AND ALL-TRAVEL SPACERS TO FIT 80-150MM) - RECON BOOST TK/RL B1 (2020)).
RockShox service kits and spare parts are best obtained through your local shop or dealer. See our dealer locator, below, to find a dealer near you. If no one is currently listed near you, then please search for local shops via your preferred web browser.
https://www.sram.com/en/dealer-locator
Manuals and additional information about RockShox and SRAM components can be found at our service site, linked below.
https://www.sram.com/en/service
Further questions?
Reach out to Rider Support by Asking A Question at the link below.
https://www.sram.com/en/rockshox/campaigns/rockshox-rider-support